Lochinvar 400 - 801 A, B, C D

1 Service

Service Manual

15

1 Service (continued)

Parameter table

Table 1-4 This table lists SMART SYSTEM control module parameters and where to access them

Menu Sub

Item Description See

Page

User Access Installer Access

Display Modify Display Modify

A

1Date and Time 19 Yes Ye s Yes Yes

2Software Version (read only) 19 No No Yes No

3Temperature Units (ºC/ºF) 19 Yes Ye s Yes Yes

4SH Night Setback Offset 19 No No Yes Yes

5SH Night Setback On Times 19 No No Ye s Yes

6SH Night Setback Off Times 19 No No Ye s Yes

7DHW Night Setback Offset 19 No No Yes Yes

8DHW Night Setback On Times 19 No No Yes Yes

9DHW Night Setback Off Times 19 No No Yes Yes

10 Display Timeout 20 No No Yes Yes

B

1SH1 Set Point 20 Yes Yes No No

2Minimum SH Set Point 20 No No Yes Yes

3Maximum SH Set Point 20 No No Yes Yes

4SH1 Offset Set Point 20 No No Yes Yes

5SH1 Differential Set Point 20 No No Ye s Yes

6SH2 Set Point 20 Yes Yes No No

7SH2 Offset Set Point 20 No No Yes Yes

8SH2 Differential Set Point 20 No No Ye s Yes

9SH3 Set Point 20 Yes Yes No No

10 SH3 Offset Set Point 20 No No Yes Yes

11 SH3 Differential Set Point 20 No No Ye s Yes

12 3-Way Valve Time 20 No No Yes Yes

C1Reset Last 10 Errors 20 No No Yes Ye s

D

1Service Mode Delay 20 No No Yes Yes

2Freeze Protection Pump On 20 No No Yes Yes

3Freeze Protection Burner On 20 No No Ye s Yes

4Freeze Protection Burner Differential 20 No No Yes Yes

GENERAL

TEMPERATURE SETTINGS

DATA

LOGGING

FUNCTIONS

Contents

Main Service Manual Models: 400 - 801 WARNING Hazard definitions Contents DANGER WARNING CAUTION CAUTION NOTICE Please read before proceeding Handling ceramic fiber materials REMOVAL OF COMBUSTION CHAMBER LINING NIOSH stated First Aid. Please read before proceeding When servicing boiler Boiler operation Boiler water Freeze protection fluids What is in this manual? Service Near boiler piping The Knight XL display Control module inputs Near boiler piping NAVIGATION DIAL The Knight XL display LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE Control inputs LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE Control outputs General Operation How the boiler operates How the control module operates Sequence of operation Access modes OPERATION DISPLAY Table 1-1 (continued from previous page) Sequence of Operation Display panel menu access Display panel parameter access Table 1-4 This table lists SMART SYSTEM control module parameters and where to access them A B C D TEMPERATURE SETTINGS DATA E OUTDOOR RESET F G CIRCULATION PUMPS I H J K Viewable and changeable control parameters A: General NOTICE C: Data Logging D: Functions B: Temperature Settings E: DHW Settings F: Outdoor Reset G: Anti-Cycling H: Control modes Cascade Offset Minimum On/Off Time J: BMS I: Circulation pumps K: Service Notification Maintenance and annual startup Service technician Owner maintenance 2 Address reported problems Check all piping for leaks Inspect boiler area Inspect boiler interior Flue vent system and air piping Check water system Check expansion tank Check boiler relief valve 2 Inspect ignition and flame sense electrodes Check ignition ground wiring Check all boiler wiring Check control settings Check flame signal Review with owner Cleaning boiler heat exchanger Before troubleshooting: Check the following: Check control module fuses Table 3-1 Troubleshooting Chart - No Display FAULT CAUSE CORRECTIVE ACTION No Display No Burner Operation Unit Does Not Modulate Above 50% Checking temperature sensors S1a S3a FAULT CAUSE CORRECTIVE ACTION Table 3-4 Troubleshooting Chart - Fault Messages Displayed on Boiler Interface Gas Pressure SW Flow Switch/LWCO Blocked Drain SW APS Open Anti-cycling Flame Fail Ign Flame Sequence Auto Reset High Limit Fan Low OR Fan Speed Low GV/Relay Fail Fan High OR Fan Speed High Sensor Open Sensor Shorted Louver Proving Sw Flue Temp High Delta T High Outlet Temp High Outlet Temp High (continued) Service Blk Rem Ctrl Flt Parameters Progr Page Combustion Analysis Procedure POSSIBLE CAUSE CORRECTIVE ACTION Gas valve adjustment procedure Model 501 Model 400 Models 601 - 801